public ICommandHandler <TCommand> GetCommandHandler <TCommand>(TCommand command)
where TCommand : ICommand
{
ICommandHandler <TCommand> handler;
try
{
handler = (ICommandHandler <TCommand>)_commandHandlers.SingleOrDefault(x => x.CanHandle(command));
}
catch (InvalidOperationException)
{
throw new ArgumentException($"More than one type found that can handle {command.GetType()} commands");
}
if (handler == null)
{
handler = _commandHandlerFactory.CreateHandlerFor(command);
}
if (handler == null)
{
throw new ArgumentException($"Could not find any handler to handle command of type {command.GetType()}");
}
return(handler);
}
private void WhenMarkingDrinksAsServed()
{
var commandHandler = _commandHandlerFactory.CreateHandlerFor <IMarkDrinksServedCommand>(_markDrinksServedCommand);
_tab = (Tab)commandHandler;
}
private void ConfigureCommandHandlerFactory(ICommandHandlerFactory commandHandlerFactory)
{
commandHandlerFactory.CreateHandlerFor(Arg.Is <TCommand>(command => command.AggregateId == AggregateId)).Returns((ICommandHandler <TCommand>)CommandHandler);
commandHandlerFactory.CreateHandlerFor(Arg.Is <TCommand>(command => command.AggregateId == _aggregateId2)).Returns((ICommandHandler <TCommand>)CommandHandler2);
}